If you stay Honda, it'll be plug and play.
If you go another brand, you're going to be changing wiring harnesses - unless you are a glutton for punishment. THEN, you'll still need a harness so you can cut the motor end off and match it, one wire at a time, to the existing.
Controls, it depends!
If side mount with just the control lever showing, and many or most binnacle controls, those are "universal" and will likely require you to just get new cables - to match whatever motor you end up with. If your binnacle mount is Honda specific, you'll likely want a new one (unless staying Honda).
If your controls are side mounted with the key built in to it, then you're likely going to a new control as well.
Note that when selling your 40, havig the controls and wiring harness available with it can add some value to the motor (maybe 200 or so)
Motors in the 90hp range would be what I'd be looking at for tubing.